Alert archive / Minnesota / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 241, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 18, 2003, 8:14 PM CDT for Cottonwood County, Jackson County, Minnesota. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2003, 8:14 PM CDT (01:14 UTC)
- Expired
- Aug 18, 2003, 8:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cottonwood County, MN, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 145 km from the middle of the area, began a volume at 01:13 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.2 hours before the alert went out and 148 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3367 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1587 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KFSD 190114
SVRFSD
MNC033-063-190145-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
814 PM CDT MON AUG 18 2003
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
COTTONWOOD COUNTY IN SOUTHWEST MINNESOTA
JACKSON COUNTY IN SOUTHWEST MINNESOTA
* UNTIL 845 PM CDT
* AT 814 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS FROM 21 MILES NORTHWEST OF MOUNTAIN
LAKE TO 11 MILES SOUTHWEST OF LAKEFIELD...OR FROM 11 MILES
SOUTHWEST OF SPRINGFIELD TO 7 MILES NORTH OF LAKE PARK...MOVING
NORTHEAST AT 25 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
MOUNTAIN LAKE AROUND 820 PM CDT
JACKSON AROUND 835 PM CDT
THESE STORMS HAVE A HISTORY OF PRODUCING HAIL AND DAMAGING WIND.
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS.
LAT...LON 4425 9527 4381 9507 4352 9535 4357 9476
4397 9455 4441 9474
$$
JRMWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 18, 2:55 PM CDT, 5 hours 19 minutes earlier.
Area forecast discussion, Aug 18, 2:55 PM CDT, 5 hours 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 255 PM CDT MON AUG 18 2003 ...CONVECTIVE CHCS ARE THE PRIMARY CONCERN THROUGH THE SHORT TERM... SYNOPSIS...12Z SUBJECTIVE UPPER AIR ANALYSIS INDICATED MAIN BRANCH OF THE POLAR JET ACROSS CNTRL CANADA. CUT-OFF UPPER LOW ASSOCIATED WITH H3 50 KT JET SEGMENT WAS LOCATED OVR WY. A COUPLE OF SHRTWVS WERE SEEN AT H5 ROTATING AROUND UPPER LO WITH FIRST OF THESE OVR WRN SD...AND NEXT UPSTREAM WV OVR WRN CO. CLOSED H85 LO WAS OVR CNTRL SD WITH TROF EXTNDD S THROUGH WRN KS. 19Z SUBJECTIVE MSAS ANAL INDICATED SFC LO OVR S-CNTRL ND WITH SFC TROF FM CNTRL SD SWD INTO CNTRL NEB. AREA 88-DS/SAT TRENDS INDICATED TRW DVLPING ALONG SFC TROF. FORECAST...DIFFICULT TO TIME CHCS FOR TRW OVR NEXT 48 HRS. AFTERNOON HEATING HAS ALLOWED FOR ATMO ALONG TROF TO BECOME MODERATELY UNSTABLE WITH SBCAPE AROUND 1500 J/KG...AND WITH CONVERGENCE ALONG TROF TRW WL CONT TO DVLP...MAINLY OVR NEB INTO FAR SE SD THRU THE EVENING HOURS. WW 868 IN EFFECT UNTIL 00Z FOR FAR SRN CWA FOR AN ISO SVR STORM...BUT NOT EXPECTING WIDESPREAD SVR TONIGHT. ACTIVITY IS DIURNALLY DRIVEN AND WLD EXPECT A WEAKENING TREND BY LATE EVENING. ETA/GFS PROG 30-40 KT LO LVL JET FM KS INTO SRN NEB WITH SOME MASS CONVERGENCE EXTNDD NE INTO CNTRL/ERN CWA. WL CONT SLC CHC POPS FOR AFTER MIDNIGHT FOR ANY REDEVELOPMENT. MAIN UPPER LEVEL SYSTEM SHLD BEGIN TO HEAD IN OUR DIRECTION ON TUES AFTERNOON. CURRENT SFC TROF WL DISSIPATE AND REFORM TO THE WEST WITH NEW HEIGHT FALLS ENTERING THE PLAINS. AS UPPER LEVEL FORCING AND SFC CONVERGENCE INCREASES TUES AFTERNOON...TRW SHLD DEVELP FM NEB NE INTO ERN SD. THETA-E DIFFS INCREASE TO AROUND 20 K BE TUES AFTERNOON AND MID LVL TMPS COOL...SO AN ISO SVR STORM IS AGAIN POSSIBLE...ESPECIALLY S OF I-90. AS LO LVL JET KICKS IN TUES NIGHT...SHLD SEE AN LINEAR MCS DVLP AND MV ACRS CWA. WL CARRY LIKELY POPS IN THE SRN CWA FOR THIS. ETA SEEMS WEAK WITH FORCING WITH UPPER LO AND WL SIDE MORE WITH THE GFS. WITH THE TROPICAL NATURE OF THE CONVECTION...CLD EVEN SEE SOME HEAVY RAIN IN THE S TUES NIGHT. SFC TROF THEN TAKES IT TIME MOVING THRU CWA ON WED AND WL CONT THE CHC POPS IN THE CNTR/ERN CWA FOR AFTERNOON TRW. UPPER LO THEN EXPECTED TO OPEN UP AND LIFT TO THE NE AS STRNG SHRTWV DIVES SE IN NW FLOW AND CLEANS CWA OUT WED NIGHT. WENT DRY FOR THE PERIOD THURS-MON. .FSD...NONE BOUSTEAD
Hazardous weather outlook, Aug 18, 2:47 PM CDT, 5 hours 27 minutes before
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-IAZ001>003- 012>014-020>022-031-032-NEZ013-014-191200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 247 PM CDT MON AUG 18 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHEAST NEBRASKA. THESE STORMS WILL MOVE NORTHEAST INTO PARTS OF NORTHWEST IOWA...AND FAR SOUTHEAST SOUTH DAKOTA LATE THIS AFTERNOON AND EARLY EVENING. A COUPLE OF THESE STORMS COULD BE SEVERE THROUGH THE EARLY EVENING. ELSEWHERE...A SLIGHT CHANCE OF THUNDERSTORMS EXISTS THROUGH EARLY EVENING IN THE JAMES VALLEY AND LOWER BRULE AREAS...EASTWARD ALONG THE I 90 CORRIDOR INTO SOUTHWEST MINNESOTA AND THE IOWA GREAT LAKES AREA. THESE STORMS SHOULD BE BELOW SEVERE LIMITS. OVERNIGHT A CHANCE OF THUNDERSTORMS COULD OCCUR...MAINLY EAST OF THE JAMES VALLEY. THIS COULD HAPPEN IF ANOTHER THUNDERSTORM COMPLEX DEVELOPS LATE EVENING IN CENTRAL NEBRASKA AND MOVES NORTHEAST. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE AREA TUESDAY AFTERNOON AND EVENING...AND CONTINUE THROUGH TUESDAY NIGHT. THERE IS A RISK THAT A FEW STORMS COULD BE SEVERE. THE RISK OF SEVERE THUNDERSTORMS MAY CONTINUE INTO WEDNESDAY...MAINLY IN SOUTHWEST MINNESOTA AND NORTHWEST IOWA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 3 PM IN EXTREME SOUTHEAST SOUTH DAKOTA...PARTS OF NORTHWEST IOWA AROUND SIOUX CITY...AND FAR NORTHEAST NEBRASKA. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
In the hours before
Local storm report, Aug 18, 6:41 PM CDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
641 PM CDT MON AUG 18 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0617 PM SIOUX CITY IA 1 INCH HAIL
08/18/03 WOODBURY REPORTED BY LAW
ENFORCEMENT OFFICIAL.
0620 PM 2 S HINTON IA .75 INCH HAIL
08/18/03 PLYMOUTH REPORTED BY COOPERATIVE
OBSERVER.Local storm report, Aug 18, 7:53 PM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
753 PM CDT MON AUG 18 2003
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0629 PM SLOAN IA WIND DAMAGE
08/18/03 WOODBURY LARGE TREES DOWN.
REPORTED BY STORM
SPOTTER.
0643 PM HORNICK IA WIND DAMAGE
08/18/03 WOODBURY FIRST OF NUMEROUS
REPORTS OF TREES AND
POWER LINES DOWN IN
SLOAN...HORNICK AND
SALIX AREAS. ONE TREE
ON HOUSE...NO INJURIES.
REPORTED BY LAW
ENFORCEMENT OFFICIAL.
0650 PM SALIX IA WIND DAMAGE
08/18/03 WOODBURY POWER LINES DOWN. ALSO
A SEMI TRUCK BLOWN OVER
NEAR SLOAN. REPORTED BY
STORM SPOTTER.
0700 PM 8 NNE KINGSLEY IA WIND DAMAGE
08/18/03 PLYMOUTH TREES DOWN. REPORTED BY
STORM SPOTTER.
0723 PM HARRIS IA .88 INCH HAIL
08/18/03 OSCEOLA REPORTED BY MEDIA.
0725 PM REMSEN IA WIND DAMAGE
08/18/03 PLYMOUTH TREE DAMAGE. REPORTED
BY STORM SPOTTER.The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:07 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 23 min |
| Aug 18, 7:31 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 44 min |
| Aug 18, 7:35 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 40 min |
| Aug 18, 8:44 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 46 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2003Every severe thunderstorm warning in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.